For the left hand she is using the same fingers Alin prefered at first: ring finger+thumb, not pinky+thumb. It seems it's much easier like that for them. In time they get used to the other too.
Kate is progressing well and continuously. The more often you use the software in a week, the greater her progress is. Few minutes a day are enough for her age. If she wants more, fine
if not, fine
My mistake, if you like, is the breaks we take. But in a way, after each period we're not using the keyboard I see greater improvements. Still, it's not a good thinking for practicing. I have to adjust home furniture and our weekly schedule to acommodate piano time daily, and make it a good habit, just like we did a while ago
Andrea